Add test cases for azure_cache.go.

Author: nilo19

cluster-autoscaler/cloudprovider/azure/azure_cache_test.go

@@ -0,0 +1,74 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package azure
+
+import (
+	"testing"
+
+	"k8s.io/autoscaler/cluster-autoscaler/cloudprovider"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRegister(t *testing.T) {
+	provider := newTestProvider(t)
+	ss := newTestScaleSet(provider.azureManager, "ss")
+
+	ac, err := newAsgCache()
+	assert.NoError(t, err)
+	ac.registeredAsgs = []cloudprovider.NodeGroup{ss}
+
+	isSuccess := ac.Register(ss)
+	assert.False(t, isSuccess)
+
+	ss1 := newTestScaleSet(provider.azureManager, "ss")
+	ss1.minSize = 2
+	isSuccess = ac.Register(ss1)
+	assert.True(t, isSuccess)
+}
+
+func TestUnRegister(t *testing.T) {
+	provider := newTestProvider(t)
+	ss := newTestScaleSet(provider.azureManager, "ss")
+	ss1 := newTestScaleSet(provider.azureManager, "ss1")
+
+	ac, err := newAsgCache()
+	assert.NoError(t, err)
+	ac.registeredAsgs = []cloudprovider.NodeGroup{ss, ss1}
+
+	isSuccess := ac.Unregister(ss)
+	assert.True(t, isSuccess)
+	assert.Equal(t, 1, len(ac.registeredAsgs))
+}
+
+func TestFindForInstance(t *testing.T) {
+	ac, err := newAsgCache()
+	assert.NoError(t, err)
+
+	inst := azureRef{Name: "/subscriptions/sub/resourceGroups/rg/providers/foo"}
+	ac.notInRegisteredAsg = make(map[azureRef]bool)
+	ac.notInRegisteredAsg[inst] = true
+	nodeGroup, err := ac.FindForInstance(&inst, vmTypeVMSS)
+	assert.Nil(t, nodeGroup)
+	assert.NoError(t, err)
+
+	ac.notInRegisteredAsg[inst] = false
+	nodeGroup, err = ac.FindForInstance(&inst, vmTypeStandard)
+	assert.Nil(t, nodeGroup)
+	assert.NoError(t, err)
+	assert.True(t, ac.notInRegisteredAsg[inst])
+}